Improvements for openRound

[madvas]

Better condition here would be: require(roundIsClosed() == true, "Round is already open"); since the round can be closed by expiration as well.

streamtide-smart-contract/streamtide.sol

Line 51 in 5740c35

require(roundDuration == 0, "Round is already open");

Additionally openRound should take roundDuration as an argument, instead of hardcoding it for 1 month

streamtide-smart-contract/streamtide.sol

Line 50 in 5740c35

function openRound() public onlyAdmin {

EDIT: Sorry I just noticed there are 2 functions openRound and startRound, seems like openRound is redundant so you can remove it